An issue was discovered in libSDL2.a in Simple DirectMedia Layer (SDL) 2.0.9 when used in conjunction with libSDL2image.a in SDL2image 2.0.4. There is a SEGV in the SDL function SDLfreeREAL at stdlib/SDL_malloc.c.
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2019-12221.json"